我无法将Oracle查询转换为SQL Server（to_date运算符）

Question

I have a select query with Oracle syntax:

select 
    to_date(acdr.cdrdate||acdr.cdrtime,'ddmmrrhh24mi') call_date,
    regexp_substr(acdr.secdur,'([1-9]{1}[0-9]?+)') call_duration,
    regexp_substr(acdr.dialednum,'^2[0-9]{3}') operator_avaya_id,
    regexp_substr(callingnum,'^(996)[0-9]{9}') calling_number,
    acdr.acmcdr_id
from 
    avaya_cm_cdr acdr

and I need convert this query to T-SQL syntax.

I tried to convert this line

to_date(acdr.cdrdate || acdr.cdrtime, 'ddmmrrhh24mi') call_date

to this:

CONVERT(varchar(50), C, 102) call_date

and

CONVERT(DATETIME, CONCAT(acdr.cdrdate, acdr.cdrtime), 104) call_date

and I tried operator cast but it did not help.

operator CONCAT(acdr.cdrdate,acdr.cdrtime) works normally and similarly || in Oracle. But I can not convert String to Date.

ERROR:

Conversion failed when converting date and/or time from character string.

select CONCAT(acdr.cdrdate,acdr.cdrtime) call_date from [avaya_cm_cdr] acdr

RESULT:

0112151647
0112151647
0112151647
0112151647
0112151647


CDRDATE varchar(6)
CDRTIME varchar(4)

Answer 1

有帮助吗？

convert(datetime, SUBSTRING(acdr.cdrdate,5,2) + SUBSTRING(acdr.cdrdate,3,2) + SUBSTRING(acdr.cdrdate,1,2), 12) + convert(datetime, SUBSTRING(acdr.cdrtime,1,2) + ':' + SUBSTRING(acdr.cdrtime,3,2) + ':00', 108)